Tank storage cost represents the expense of storing liquid commodities such as crude oil, refined products, or chemicals in storage tanks. These costs include facility rental, insurance, handling fees, and quality maintenance expenses. Storage costs significantly affect commodity pricing, particularly for contango markets where storage economics influence price relationships.

Tank storage costs vary by location, facility type, product specifications, and market conditions. High storage costs can limit contango spreads and affect inventory decisions. Understanding storage economics helps assess commodity price structures, seasonal patterns, and arbitrage opportunities that depend on storage capacity availability and costs.

Real-world example: Crude oil storage at Cushing, Oklahoma costs $0.50 per barrel per month, affecting WTI futures contango spreads and influencing traders’ decisions about storing oil when front-month prices are significantly below deferred months.